rolllog

Development times

Ilford HP5 Plus in Ilford Ilfotec HC

7 times for 1+15, 1+31, EI 400–3200, 20 °C. From HARMAN technology HP5 PLUS Technical Information (2018-11).

Box speed (EI 400), 20 °C, 1+15, intermittent
3:30
Box speed (EI 400), 20 °C, 1+31, intermittent
6:30

Times

1+15 · intermittent

Ilford HP5 Plus in Ilford Ilfotec HC 1+15 · intermittent: time in minutes:seconds by exposure index and temperature
EI20 °C
4003:30
8005:00
16007:30
320011:00

1+31 · intermittent

Ilford HP5 Plus in Ilford Ilfotec HC 1+31 · intermittent: time in minutes:seconds by exposure index and temperature
EI20 °C
4006:30
8009:30
160014:00

Source: HARMAN technology HP5 PLUS Technical Information (2018-11)

Time in min:sec. A dash means the source gives no time for that combination; rolllog doesn't fill gaps. These are starting points: test with your own process.

Ilford HP5 Plus in other developers

Other films in Ilford Ilfotec HC

Same data from the API

curl "https://rolllog.io/api/v1/films/ilford-hp5-plus/dev-times?developer=ilford-ilfotec-hc"

All of Ilford HP5 Plus: exposure, reciprocity, formats and prices.